Conveyor Belt Filter Device

Abstract

A conveyor belt filter device for mechanically cleaning a liquid that flows in a sewer and is polluted with solids includes an endless filter belt formed by filter elements that are connected to one another and can be pivoted against one another. A frame having a lower frame portion for forming a lower filter belt conveying path within the sewer and an upper frame portion for forming an upper filter belt conveying path outside of the sewer supports the belt. The upper frame portion has a solids removal device in the area of an upper deflection device for removing solids adhering to the filter elements. The upper filter belt conveying path is arranged at an angle of inclination α relative to the lower filter belt conveying path.

1 . A conveyor belt filter device for mechanically cleaning a liquid that flows in a sewer and is polluted with solids, said filter device comprising:
 an endless filter belt formed by filter elements pivotally connected to one another and driven along a first conveyor path having a lower filter belt conveying path and an upper filter belt conveying path:   a lower deflection device and at least one upper deflection device guiding said endless filter belt along said first conveyor path;   a frame supportings the filter belt, the frame having a lower frame portion defining the lower filter belt conveying path and an upper frame portion defining the upper filter belt conveying path above said lower filter conveying path, the upper frame portion having a solids removal device proximal the upper deflection device for removing solids adhering to the filter elements, the upper filter belt conveying path being arranged at an angle of inclination α relative to the lower filter belt conveying path.   
     
     
         2 . The conveyor belt filter device according to  claim 1 , including a deflection device arranged at a deflecting section of the frame to form the angle of inclination α proximal a transition between the lower filter belt conveying path and the upper filter belt conveying path. 
     
     
         3 . The conveyor belt filter device according to  claim 2 , in which the upper frame portion pivots relative to the lower frame portion to adjust the angle of inclination α. 
     
     
         4 . A sewer cleaning assembly comprising:
 a conveyor belt filter device according to  claim 1  and installed in a sewer, wherein a frame base of the lower frame portion is supported on a sewer bottom of the sewer proximal the lower deflection device, and a frame base of the upper frame portion is mounted on an installation plane outside of the sewer in such a manner that the distance a between the lower deflection device and the upper deflection device is smaller than the length l of the total conveying path, which is composed of the length l 1  of the lower filter belt conveying path and of the length l 2  of the upper filter belt conveying path.   
     
     
         5 . The sewer cleaning assembly according to  claim 4 , in which the lower filter belt conveying path is arranged at an angle of incidence β between 15° and 45° relative to the sewer bottom and the upper filter belt conveying path is arranged at an angle of installation γ equal to β plus a relative to the sewer bottom on the installation plane. 
     
     
         6 . The sewer cleaning assembly according to  claim 5 , in which the angle of incidence β is between 25° and 30°. 
     
     
         7 . The sewer cleaning assembly according to  claim 4 , in which a deflecting section of the frame is arranged proximal an upper edge of the sewer. 
     
     
         8 . The sewer cleaning assembly according to  claim 4 , in which a support supports the frame proximal a deflecting section on a sewer wall or on the installation plane. 
     
     
         9 . The sewer cleaning assembly according to  claim 4 , in which the upper frame portion is provided with a lifting device for changing the distance of a deflecting section of the frame relative to the sewer bottom.